* {
    margin: 0;
    padding: 0;
}

.box {
    box-sizing: border-box;
    margin: 0 auto;
    width: 480px;
    height: 590px;
    background-image: url(../images/bg.png);
}

/* 按钮 */
.minus,
.add {
    display: inline-block;
    width: 52px;
    height: 44px;
    cursor: pointer;
    vertical-align: middle;
    background-image: url(../images/sub.png);
}

.add {
    background-image: url(../images/add.png);
}

/* 文本框 */
.pronum,
.info {
    box-sizing: border-box;
    padding: 0 5px;
    min-width: 40px;
    height: 35px;
    line-height: 35px;
    background: white;
    border-radius: 3px;
    text-align: center;
    vertical-align: middle;
}

.pronum {
    display: inline-block;
}

/* 头部 */
.top {
    padding: 50px 20px 0;
    height: 387px;
}

.hang {
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.hang .info {
    box-sizing: border-box;
    padding: 0 10px;
    width: 260px;
    color: white;
    font-size: 14px;
    text-align: left;
    line-height: 35px;
    background: #171818;
}

.bottom {
    padding-top: 20px;
    color: #878787;
    padding-left: 50px;
    line-height: 40px;
}